2D DEM of Ice Rubble: the effect of rate-dependent friction.
The friction coefficient of ice on ice is usually modeled as a constant. However, theory and experimental data show that ice-ice friction depends on the speed of sliding. In this paper we incorporate a rate-dependent friction coefficient into 2D discrete element method simulations of ice ensemble be...
| Main Authors: | , |
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| Format: | Text |
| Language: | unknown |
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London South Bank University
2015
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| Online Access: | https://openresearch.lsbu.ac.uk/item/87695 https://openresearch.lsbu.ac.uk/download/78d4bbbd88b92d96b62dc6f5b18f6ba55c2fb8e1e0ef8e12187f01d0d755a9ac/1036717/2015%20POAC%20DEMs%20and%20friction.pdf |
| Summary: | The friction coefficient of ice on ice is usually modeled as a constant. However, theory and experimental data show that ice-ice friction depends on the speed of sliding. In this paper we incorporate a rate-dependent friction coefficient into 2D discrete element method simulations of ice ensemble behaviour. Friction is high (0.7) at low sliding speeds (<10-6 ms-1), low (0.1) at high sliding speeds (>10-2 ms-1) and decreases log-linearly between these values. We show qualitatively and quantitatively how this affects the overall dynamics of a shear box experiment. |
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